Observation and interpretation of topological structures in impurity ion radiation profiles from the hot plasma of a torsatronB. Zurro, K. J. McCarthy, E. Ascasíbar, F. Aragón, C. Burgos, A. López and A. SalasEurophys. Lett., 40 3 (1997) 269-274DOI: https://doi.org/10.1209/epl/i1997-00459-5